Several preparing works to be done of SDA bolt engineering

The fundamental principle of geotechnical anchoring is to transfer tension of structures or keep self stability of excavation face in stratum, relying on shearing strength of hollow anchor bolt’s surrounding stratum.

Main construction equipment during process are drilling machine and grouting equipment. Before equipment entering construction site, they should be checked completely.

There are two kinds of professional people at construction site: technical operator and contributor. To guarantee their safety, all the design and operation works should be abided by the rules, especially at underground and closed space.